@startuml
class CommandSaveUtil <<static>> {
    + {static} saveLinkedList(list:LinkedList<CommandDTO>, saveFilePath:string) : bool
    + {static} loadLinkedList(saveFilePath:string) : LinkedList<CommandDTO>
    + {static} deleteSaveFile(saveFilePath:string) : void
    + {static} hasSaveFile(saveFilePath:string) : bool
}
@enduml